Friction casement adjuster



Sept. 8, 1931. G. A. WELLMAN FRICTION CASEMENT ADJUSTER Filed Dec. 17Il 1926 Inventor: I

am mvg/gf Patented Sept. 8, 1931 UNITED STATES PATENT OFFICE GUY A. WELLMAN, OF GENEVA, OHIO, ASSIGNOR.. TO THE CI-IiMPION HARDWARE COVI-.g

PANY, F GENEVA, OHIO, A CORPORATION OF OHIO FRICTION CASEMENT ADJUSTER Application filed December 17, 1926. Serial No. 155,481.

This invention relates to friction easement adjusters and has for its object to provide a device which is an improvement over those` in present use and further, one which is sim- 4b; ple in construction and inexpensive to manufacture.

A further object of the invention is to provide means for adjusting the friction members of the device in such a manner that the 1o said members will contact equally along their entire outer surfaces, thereby affording a greater contacting surface and nicety of adjustment than is possible with the present types of adjusters.

Another object of the invention is the provision of a supporting and attaching bracket for the adjuster' which is capable of permitting the adjuster to be moved through a greater number of angular positions than is at present possible with the types now used, and further, to permit the adjuster to be attached whenever desired, to easements, the surfaces of which may be in different planes withl respect to each other.

l As a still further object of the invention there is provided means for limiting the longitudinal movement of the inner rod With- 'in the telescoping outer tubular member, when the same have once been assembled and secured to the easement or other hinged device, but without in any manner, interfering with the regulating of the friction therebetween or the free movement of one member within the other. '35' Vith the objects above indicated and other objects hereinafter explained in view, my invention consists inthe construction and com- Abination of elementshereinafter described and claimed.

Referring to the drawings:

Fig. 1 is a top plan view of the easement adjuster. i

Fig. 2 is a side elevational view of the same. l Fig. 3 is an end View of the bracket showing the manner -in which the adjuster is secured thereto.

Fig. 4 is a longitudinal cross sectional view of a portion of said easement adjuster shovv- Y .ing the means for regulating the friction between the telescoping members.

Fig. 5 is a plan viewof one of the friction shoes.

Fig. 6 is a cross sectional view taken on line 55 6-6 of Fig. 4.

In the drawings, 10 indicates an outer tubular member in which is mounted for longitudinal movement a rod 11, the latter being guided throughout its movement by aio cap 12 in screw-threaded enga-gement with the inner end of the tubular member 10 and through which the rod extends.l The outer end of the rod 11 has a flattened integral head 14 having a central opening, through y165 which extends a pin 15, the ends of which are secured to a pair of ears 16 formed integral with the bracket 17a. The bracket is provided with screw openings, preferably .countersunk, so that it may be conveniently .70

attached to some shown.

The tubular member 10 has circumferentially extending inner ribs 17 formed at its outer end anda plug 18 having a reduced T75 end portion-provided with circumferentially extending grooves 18 which are adapted to part of a easement, not

engage 'the vribs 17 in such a manner as to permit the tubular member 10 to be freely rotated upon the plug 18, but at the samezso ,time preventing vdisengagement therebetween. The plug' 18 is further provided with a transverse opening through which loosely extends a pin 19, the ends of which are secured in the upwardly extending ears 20 of a Ushaped member 21. The lower portion of the U-shaped member 21 carries a depending pin 22 which extends through an opening in an attaching plate 23, the lower `end ofthe pin being peened over to prevent disengagement therefrom but at the same time permitting the U-shaped member to be freely rotated. n

To provide a fiat under surface for attaching the plate 23 to a portion of the easement, 95 the central portion of the plate is ressed outwardly to form a channel 24 of su cient depth to accommodate the end of the pin 22 without the same interfering with the yattaching surface. The plate is also provided'with suitleo able countersunk openings adapted to receive screws or other means, for securing the same to the easement.

It will be readily seen, referring to Fig. 3, that a type of bracket has been employed which permits the tubular member l tobe movedth'rough aplurality ofangular positions so that the easement adjuster maybe secured to a suitable easement, or other pivoted structiu'e in which the attaching surfaces of the easement lie in different angular planes. j Y

Between the inner surface of the tubular member and the rod ll't'hereis provided Yan adjustable friction member so arranged that theffriction'upon' the inner' surface of the tubular member maybe adjusted by rotating the tubular member in the proper direction, while the adjuster is secured to the easement. This member consists ofa pair' of semi-circular friction shoes of suitable length, which arey spaced apart `along their longitudinal surfaces, and which have a central cooperating bore 26,v the outer end being screw-threaded at '27nto enga-ge the reduced screw-threaded end 28 of the rodllli Midway of the ends of the friction shoes 25 are oppositely disposed recesses 29 of suitable length, in which are secured the endsofflat springs 30 having parallel extending mid-portions which engage with the reduced portion 3l of the rod 11 formed adjacent the screw-threadedend 28. Between the reduced portion 3l andthe reduced end 28 the rod is tapered at 32, which taperedsurface isadapted to engage thereceding ends of the" springs 30 to spread the friction shoes 25 outwardly upon proper rotation of the tubular `member l0., At theouter ,endof thereduced'portion 31 the lrod is tapered'outwardly as at 33, and engages the tapered walls'34 :formed upon the inner portion andat the outer endofthe'frictionshoes 25, so that by Vrotating the tubular member 10 in ak directionopposit'e to that heretofore described, the friction ofthe friction shoes 25 against theinner surface ofthe tubular member: 10 may also be regulated."Y Itwill, therefore, be seen that the friction between the tubular member 10 and the rod 11 can be j' regulated by rotation of the tubularmember vineither direction and :that at a c'ertainpoint, Vas shown in Fig; 4L, when there is .substan- -tially no force applied to the'springs 30, the friction is at a minimum, so that' the rod v11 may be freely moved longitudinally within the tubular member 10 and theamount ,of rotation of the tubular member 10, in either direction, determines the degree of friction Ybetweenthe friction shoes 25'and the tubular member 10. j Y

lThe particular shape of the springs 30-is important, the recedingl end portions thereof being properly positioned with respect to the .tapered Asurfaces 32 and 3.3of'the rod V1l, so that asthetap'ered"portionA 33 of the rod 11 acts against the receding end portions of the springs 3() to spread the friction shoes 25 outwardly as the tubular member l0 is properly rotated, a substantially equal force is transmitted to the opposite ends of the springs 30, thereby expanding the' friction shoes 25 equally throu-gheut the 'length to increase the friction between -the shoes and the tubular member. This arrangement causes the friction shoes 25 to engage alongtheir entire con- 75 tacting' surfaces with substantially equal force so that agreater friction surface is provided anda finer adjustment afforded.

The same result Yoccurs as just described, when the tapered portion 32 is brought into 80 .engagement withthe opposite receding end portions ofi the'sprin-gs 30upon rotation=of the tubular-"member 10 in the'opposited-irection.. i i

To prevent the possibility.ofdisengagement between the rod 1l and the friction shoes125, anannular 'head 35 issecfuredto the extension 36 on the inner-end ofthe rod Iso that, should the turbular'meanberil() -be' rotated in one direction too far, the 'head 35 `willabut the 'end lof QO the friction shoes 25and thereby prevent possible disengagement'betweenthe.rod andft-lie friction shoes. v i

It is believed that the operationoftheadjusterV will .be readily understood: from the -#.15 foregoing description and vfurther eXp-lanatien is deemedunnecessary.4 Iavingthus described: my invention, I claim l1. AV easement adjuster comprising: aintouterv tubular member rotatably mounted upon anattachingibracket', innermember slidable within said-'tubular membe-rand having its extended end mounted uponaesecond bracket, and friction means :carried :by saidi-05 inner member and engaging the outer tubular member, the'rota'tion of said -outertubular member in'v either direction increasing the friction between the friction means and'said outer tubular member.

2. A easementV adjuster comprising: an

outer tubular member rotatablyv mounted upon anattachingbracket, an innermember slidable within said tubular memberandfhaving itsl extendedl endy mounted upon a second 115 bracket, and friction means carried vby said inner member and engaging the outer tubular member, the rotation of said outer= tubular member in either direction increasing: lthe friction thereby. controlli-ng the relative longitudinal movement between the -outer tubular member and said inner member.

3. A Casement adjuster comprising; an outer member, an inner rod'slidably mount-ed within said outer member,-frictionshoeshaving longitudinally extending cooperating bores screw-threaded at their inner ends, said rod Yextending through saidlbores' and' in screw-threaded' engagement; therewith, and

means carriedl by saidV friction shoes and engageable with portions of said rod, the rotation of said tubular member causing said friction shoes to expand uniformly throughout their entire length.

4. A easement adjuster comprising an outer member, an inner rod slidably mounted within said outer member, friction shoes having longitudinally extending cooperating bores, oppositely disposed resilient members having parallel portions and receding ends mounted in said friction shoes, said rod eX- tending through said bores and in adjustable engagement with said shoes, the rod having a reduced portion engaging said parallel portions of said resilient members and tapered portions on said rod adapted to be moved into engagement with said receding ends upon rotation of said tubular member to expand said shoes uniformly to thereby regulate the friction of said shoes with respect to said tubular member.

5. In a easement adjuster, the combination of an outer member, an inner member mounted for slidable movement vin said outer member, shoes arranged around said inner member adjacent the end thereof for frictional engagement with said outer member, and means carried by said shoes adapted to engage one portion of said inner member upon rotation of said outer member in one direction and adapted to engage another portion of said inner member upon rotation of said outer member in the other direction whereby the frictional engagement between said shoes and said outer member may be increased by rotation of said outer member in either direction.

In testimony whereof, I hereunto aiix my 

